CN108638709A - A kind of PLC teaching platforms - Google Patents

A kind of PLC teaching platforms Download PDF

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Publication number
CN108638709A
CN108638709A CN201810745774.5A CN201810745774A CN108638709A CN 108638709 A CN108638709 A CN 108638709A CN 201810745774 A CN201810745774 A CN 201810745774A CN 108638709 A CN108638709 A CN 108638709A
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CN
China
Prior art keywords
plastic closure
guide sleeve
steel disc
control cabinet
plc
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Granted
Application number
CN201810745774.5A
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Chinese (zh)
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CN108638709B (en
Inventor
周永平
杨鸿�
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周永平
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Priority to CN201810745774.5A priority Critical patent/CN108638709B/en
Publication of CN108638709A publication Critical patent/CN108638709A/en
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Publication of CN108638709B publication Critical patent/CN108638709B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/04Blackboards
    • B43L1/08Blackboards flexible
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/004Repeatedly-usable boards or tablets for writing or drawing with illuminating devices
    • B43L1/006Repeatedly-usable boards or tablets for writing or drawing with illuminating devices with luminescent substances
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L21/00Blackboard or slate cleaning devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00Structural combinations of lighting devices with other articles, not otherwise provided for

Abstract

The present invention relates to the ancillary equipment fields of PLC teaching, more particularly to a kind of PLC teaching platforms, including desk body, PLC control cabinet is installed in desk body, mounting groove is offered in PLC control cabinet, the guide sleeve with spill mouth is installed at the upper side wall of mounting groove, permanent magnet is equipped in guide sleeve two side, conductive reed is installed on permanent magnet, rotation is combined with winding up roller in the opening of guide sleeve, plastic closure is slidably connected in PLC control cabinet, the top of plastic closure is located in the spill mouth of guide sleeve, plastic closure is towards being installed with chalk writing board on mounting groove lateral surface, chalk-writing plate surface is equipped with the steel disc of elasticity, the top of steel disc is fixedly connected on winding up roller, the bottom end of steel disc is installed with two pieces of iron blocks adsorbed for permanent magnet;It is electrically connected with the first conducting wire between iron block, power supply and headlamp is electrically connected with by the second conducting wire between conductive reed.The present invention lights headlamp and is illuminated while opening capping for teacher's writing and teaching content.

Description

A kind of PLC teaching platforms
Technical field
The present invention relates to the ancillary equipment fields of PLC teaching, and in particular to a kind of PLC teaching platforms.
Background technology
PLC (Programmable Logic Controller, programmable logic controller (PLC)) controller is that one kind specially exists The electronic device of digital operation applied and designed under industrial environment.Due to PLC controller in industrial control field and its The extensive use of his industry, so the teaching of PLC control technology is always the important course of big-and-middle universities and colleges' electromechanics, electric specialty. The teaching of PLC control technology generally uses Classroom theory teaching and experimental real-training teaching.
In the experimental real-training teaching of PLC control technology, the real training that is mainly connected up by PLC control cabinet component show into It goes, more component, conducting wire connection correct rear progress each Industry Control of various components is installed in cabinet.Carry out When demonstration teaching, teacher generally will not hot line job, because connecing when avoiding operation mistiming from touching and get an electric shock, while avoiding demonstration teaching Wrong conducting wire leads to short circuit.For the ease of placing, PLC control cabinet generally makes rectangular cabinet, and various components and conducting wire exist In the cabinet of the confined space, the side walls of various components, conducting wire and cabinet blocks some light, and each component connects Line port sizes are smaller, and each port is also identified with identifier, when connecting the conducting wire of each component, light in cabinet compared with Secretly, it is not easy to which seeing port clearly leads to conducting wire connection error.
Invention content
The invention is intended to provide a kind of PLC teaching platforms, light is weaker when being connected with solving to connect up in cabinet causes to lead The problem of line connection error.
PLC teaching platforms in this programme include the desk body with more table legs, PLC controls are installed in the desk body Cabinet offers mounting groove in the PLC control cabinet, mounting bar is installed on the inner wall of the mounting groove, is opened on the mounting bar Equipped with through-hole, separated time slot is offered on the mounting groove slot bottom below the mounting bar, is installed at the upper side wall of the mounting groove Guide sleeve with spill mouth is equipped with permanent magnet, the opposite side of the permanent magnet on the left side wall and right side wall of the guide sleeve On be installed with conductive reed, in the opening of the guide sleeve rotation be combined with winding up roller, envelope is slidably connected in the PLC control cabinet The top of the firmly plastic closure of mounting groove, the plastic closure is located in the spill mouth of guide sleeve, the plastic closure direction installation It is installed with chalk writing board on one side outside slot, magnetic nail, the chalk are installed on the lower end of the chalk writing board The steel disc that plate surface is equipped with elasticity is write, the top of the steel disc is fixedly connected on winding up roller, and the steel disc can be wound on winding up roller On, the bottom end of the steel disc is installed with two pieces of iron blocks adsorbed for permanent magnet, is connected to after the iron block contact permanent magnet conductive Reed offers the kerve being inserted into for magnetic nail on the lower end of the steel disc, metal is installed on the inner wall of the kerve Piece;
The first conducting wire in plastic closure is electrically connected between the iron block, the iron block can connect with conductive reed It is logical, power supply and headlamp are electrically connected with by the second conducting wire between the conductive reed, headlamp is located at the roof of PLC control cabinet On, the power supply, headlamp, iron block, conductive reed, the first conducting wire and the series connection of the second conducting wire.
The working principle and beneficial effect of this programme is:Before demonstration lesson, plastic closure shelters from the peace of PLC control cabinet Tankage accumulates dust in PLC control cabinet when avoiding being not used, iron block is with conductive reed not in contact with headlamp is not powered on illumination, together When steel disc seal chalk writing board, avoid the chalk writing board before non-demonstration teaching from arbitrarily being scrawled by student;It is taught in demonstration Class hour, teacher first push plastic closure open upwards, when the bottom end of plastic closure is pulled at guide sleeve, plastic closure bottom end Iron block is adsorbed on the position that fixed plastics cover on the permanent magnet of guide sleeve, and plastic closure is avoided to fall;It is pulled in plastic closure While at guide sleeve, iron block attracts each other with magnet and touches conductive reed, and headlamp, which powers on, to be lit, and headlamp is given PLC control cabinet intraoral illumination;Magnetic nail since steel disc top is fixed on winding up roller, and on chalk writing board lower end is inserted into kerve In and be adsorbed on sheet metal, plastic closure can make during being pulled at guide sleeve magnetic nail deviate from kerve, allow steel disc to wind On winding up roller, so when the bottom end of plastic closure is pulled in guide sleeve, winding up roller winds off the steel disc of chalk-writing plate surface, dew Go out chalk writing board.
Component is installed to by through-hole on mounting bar after being open by teacher and carries out demonstration lesson by plastic closure, is exposed Chalk writing board for teacher's writing and teaching content, while headlamp is shone to the wiring demonstration in PLC control cabinet It is bright;When teaching, which finishes, closes plastic closure, by plastic closure pulled down, magnetic nail reinserts in kerve, allows plastic seal Steel disc is pulled up out from winding up roller while lid moves down, steel disc covers chalk writing board again.
Compared with prior art, this programme allows teacher's writing and teaching content pushing plastic closure open and expose chalk writing board, Meanwhile it being connected to the power supply of headlamp, headlamp is illuminated to PLC control cabinet inside, and dim light in PLC control cabinet is avoided to lead It causes teacher not see Wiring port and wrong line, prevents the teaching of teacher from slipping up.
Further, be installed with elastic strip between the left side wall and right side wall of the guide sleeve, the elastic strip be located at winding up roller with Between plastic closure, the elastic strip touches the bristle of chalk writing board towards being installed on plastic closure side.
During plastic closure moves up or down, since bristle contacts chalk writing board, bristle brushes off chalk book The written contents of plate surface are write, chalk writing board is kept not have written contents in teaching, reducing teacher will also be first before teaching Wipe the workload of written contents;After steel disc is on winding up roller, the steel plate thickness on winding up roller increases, the steel disc after winding It is protruded to chalk writing board side against elastic strip, bristle is extruded on chalk writing board after elastic strip protrusion and is brushed off in writing Hold, especially when plastic closure moves down, the elastic strip of protrusion presses against chalk writing board and wipes written contents, makes chalk-writing Content on plate is wiped cleaner;And when needing to wipe the written contents on chalk writing board in teaching process, it can will mould Material capping slides onto or slides the written contents come on erasing blackboard.
Further, air flue is offered in the elastic strip, the air flue is provided with a plurality of air holes towards bristle side, described Air-tightness is combined with piston head in air flue, and the piston head is towards adhesive-layer is coated on stomata side, on the piston head The elastic drag rope that fixed oriented air flue both ends pull, the elastic drag rope is in plastic closure bottom part in the spill mouth of guide sleeve Free state is in when middle, the end of the elastic drag rope is separately fixed on the bottom end of plastic closure.
In slide downward plastic closure, plastic closure pulls elastic drag rope, elastic drag rope to generate tensile elasticity deformation, Elastic drag rope drives piston head to be moved to air flue both sides, forms negative pressure when piston head moves at stomata, bristle is allowed to wipe powder Part chalk dust is fallen in absorption after content on clipboard, and chalk dust avoids chalk dust into being adhered on adhesive-layer after air entering flue It adhering on bristle again, while piston head scrapes air passing hole, dredging stomata avoids blocking, when plastic closure moves up, bullet The pulling force that property drawstring is subject to is gradually reduced, and elastic drag rope gradually restores elastic deformation, and piston head is allowed to be moved in opposite directions to the centre of air flue Dynamic, piston head squeezes out the air in air flue from stomata, and the air squeezed out from stomata forms air-flow, blows the powder on bristle off Pen ash, keeps bristle cleaner, when bristle brushing chalk writing board, chalk dust will not be allowed to be brushed on chalk writing board again.
Further, it is installed with rubber layer on the left and right side edge of the steel disc.
Rubber layer seals the sharp edge of steel disc, avoids steel disc edge too sharp and scratches the skin of teacher.
Further, the table leg include internal thread sleeve and have externally threaded supporting rod, described supporting rod one end spiral shell Line is connected in sleeve, and the supporting rod other end is fixedly connected in desk body.
It when carrying out demonstration teaching, screws sleeve and supporting rod is screwed out into sleeve, to be lifted desk body height, screwing sleeve will To reduce desk body height in supporting rod precession sleeve, table leg can contracting leg characteristic for adjusting the height of desk body, avoid desk body will PLC control cabinet lifting too high and make teacher to lift arm laborious when being write on chalk writing board.
Further, it is hinged with L-shaped supports block on the left side wall and right side wall of the PLC control cabinet, the supports block is respectively positioned on At the lower face of guide sleeve, elastic string is installed between the supports block and the side wall of PLC control cabinet.
Plastic closure first breaks supports block towards desk body both sides into two with one's hands when sliding downward or upward, and plastic closure is allowed to be located at supports block Between, elastic string generates tensile elasticity deformation, and when the bottom end of plastic closure is located in guide sleeve and is located above supports block, release moves The active force of supports block, elastic string restore elastic deformation and make supports block again be located at guide sleeve lower face at, supports block to plastic closure into Row support, avoids plastic closure slide downward in the written contents on chalk writing board.
Description of the drawings
Fig. 1 is the structural schematic diagram of PLC teaching platforms embodiment of the present invention;
Fig. 2 is structural schematic diagram when PLC control cabinet uses in Fig. 1;
Fig. 3 is the vertical view of the structure of guide sleeve in Fig. 2;
Fig. 4 is the power supply circuit schematic diagram of headlamp in Fig. 2;
Fig. 5 is the side view of winding up roller, steel disc and chalk writing board position relationship;
Fig. 6 is the internal structure schematic diagram of elastic strip in Fig. 3.
Specific implementation mode
Below by the further details of explanation of specific implementation mode.
Reference numeral in Figure of description includes:Desk body 1, sleeve 2, supporting rod 3, PLC control cabinet 4, plastic closure 5, Guide sleeve 6, winding up roller 7, mounting groove 8, mounting bar 9, through-hole 10, separated time slot 11, chalk writing board 12, iron block 13, conductive reed 14, steel Piece 15, elastic strip 17, headlamp 18, the first conducting wire 19, the second conducting wire 20, power supply 21, supports block 22, magnetic nail 23, is lived at bristle 16 Chock plug 24, elastic drag rope 25, stomata 26, air flue 27.
PLC teaching platforms, as shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5:Including desk body 1, welded on the bottom face of desk body 1 There are four table legs, table leg to include the sleeve 2 of internal thread and there is externally threaded supporting rod 3,3 threaded one end of supporting rod to be connected to set In cylinder 2,3 other end of supporting rod is welded to connect in desk body 1, and PLC control cabinet 4, the bottom end of PLC control cabinet 4 are welded in desk body 1 Face is welded in desk body 1, and desk body 1 also places the educational aids such as textbook for teacher, and mounting groove 8 is offered in PLC control cabinet 4, Mounting bar 9 is welded on the inner wall of mounting groove 8, the both ends of mounting bar 9 are respectively welded at the left side wall and right side wall of mounting groove 8 On, multiple through-holes 10 are offered on mounting bar 9, the quantity of through-hole 10 is set according to the length of mounting bar 9, such as 30cm 6 through-holes 10 can be arranged in mounting bar 9, and separated time slot 11 is offered on 8 slot bottom of mounting groove of 9 lower section of each mounting bar, mounting groove 8 The guide sleeve 6 with spill mouth is welded at top, guide sleeve 6 is welded on the notch end face at 8 top of mounting groove, a left side for guide sleeve 6 Insertion is equipped with permanent magnet in side wall and right side wall, and conductive reed 14, conductive spring are welded on the opposite side of permanent magnet Piece 14 is rectangular, and the long side of conductive reed 14 is vertically distributed, and being rotatably assorted by fixing axle in the opening of guide sleeve 6 has volume The both ends of roller 7, i.e. spool are welded on the two side of the opening of guide sleeve 6, and winding up roller 7 is set on spool, is had between winding up roller 7 and spool There is the gap of rotation.
L-shaped supports block 22 is hinged on the left side wall and right side wall of PLC control cabinet 4, supports block 22 is hinged on PLC by hinge On switch board 4, the hinge that supports block 22 is opened using the cabinet door of existing cabinet, supports block 22 is respectively positioned at the lower face of guide sleeve 6, supports block 22 and PLC control cabinet 4 side wall between be bonded with elastic string, elastic string one end is bonded in supports block 22, the elastic string other end bonding On 4 side wall of PLC control cabinet.
As shown in fig. 6, be bonded with elastic strip 17 between the left side wall and right side wall of guide sleeve 6, elastic strip 17 be located at winding up roller 7 with Between plastic closure 5, elastic strip 17 touches the bristle 16 of chalk writing board 12, bullet towards being bonded on 5 side of plastic closure Property item 17 in offer air flue 27, air flue 27 is provided with a plurality of air holes 26 towards 16 side of bristle, and air-tightness coordinates in air flue 27 There is a piston 24, piston head 24 is bonded 27 both ends of oriented air flue towards adhesive-layer is coated on 26 side of stomata on piston head 24 The elastic drag rope 25 that portion pulls is in free shape when elastic drag rope 25 is in spill mouth of 5 bottom part of plastic closure in guide sleeve 6 The end of state, elastic drag rope 25 is bonded in respectively on the bottom end of plastic closure 5,26 a diameter of 2mm of stomata.
The plastic closure 5 for sealing mounting groove 8,4 left and right side of PLC control cabinet opposition are slidably connected in PLC control cabinet 4 Frame on offer the sliding slots of T shapes, integrally formed with along vertically to the guide post of distribution, guide post clearance fit on plastic closure 5 In sliding slot, the shape of guide post coordinates with sliding slot, and the top of plastic closure 5 is located in guide sleeve 6, and plastic closure 5 is towards mounting groove 8 It is bonded with chalk writing board 12 on outer one side, chalk writing board 12 is towards being welded with magnetic nail on the lower end of 15 side of steel disc 23, magnetic nail 23 is made using cylindrical magnetic iron, and flexible steel disc 15 is placed on 12 surface of chalk writing board, and steel disc 15 uses existing The identical material of steel tape band in tape measure is made, since there is steel disc 15 toughness and crimpiness, 15 auto reeling of steel disc to roll up On roller 7, rubber layer is bonded on the left and right side edge of steel disc 15, the top of steel disc 15 is welded on winding up roller 7, under steel disc 15 End offers the kerve being inserted into for magnetic nail 23, and kerve is towards the top end part side of steel disc 15 at inclined-plane, and inclined-plane is towards steel 15 surface of piece tilts upward, and ensures that steel disc 15 can be bonded with sheet metal, sheet metal on winding up roller 7 on the inner wall of kerve Existing iron plate can be used, is bonded with two pieces of iron blocks 13 between the bottom end and the bottom end of chalk writing board 12 of steel disc 15, iron block 13 is located at It can contact at the both side ends of chalk writing board 12 and with permanent magnet.
The first conducting wire 19 in plastic closure 5 is electrically connected between iron block 13, iron block 13 can connect with conductive reed 14 It is logical, power supply 21 and headlamp 18 are electrically connected with by the second conducting wire 20 between conductive reed 14, headlamp 18 is mounted on PLC control cabinet On 4 roof, power supply 21, headlamp 18, iron block 13, conductive reed 14, the first conducting wire 19 and the series connection of the second conducting wire 20.
When specifically used, before demonstration lesson, plastic closure 5 shelters from the mounting groove 8 of PLC control cabinet 4, avoids being not used When PLC control cabinet 4 in accumulate dust, iron block 13 and conductive reed 14 are not in contact with headlamp 18 is not powered on illumination, while steel disc 15 Chalk writing board 12 is sealed, the chalk writing board before non-demonstration teaching is avoided arbitrarily to be scrawled by student.
In demonstration teaching, supports block 22 is broken into two with one's hands towards desk body both sides first, allows plastic closure 5 between supports block 22, elastic string Tensile elasticity deformation is generated, teacher first pushes plastic closure 5 open upwards, when the bottom end of plastic closure 5 is pulled at guide sleeve 6 When, the active force for moving supports block 22 is unclamped, elastic string restores elastic deformation and supports block 22 is made to be located at again at 6 lower face of guide sleeve, Supports block 22 is supported plastic closure 5, and the iron block 13 of 5 bottom end of plastic closure is adsorbed on fixed plastics on the permanent magnet of guide sleeve 6 The position of capping 5 avoids plastic closure 5 from falling;While plastic closure 5 is pulled at guide sleeve 6, iron block 13 and magnet are mutual Attract and touch conductive reed 14, headlamp 18 powers on 21 and is lit, and headlamp 18 gives 4 intraoral illumination of PLC control cabinet;By It is fixed in the insertion kerve of the magnetic nail 23 on winding up roller 7 and on 12 lower end of chalk writing board in 15 top of steel disc and is adsorbed on gold Belonging on piece, plastic closure 5 can make magnetic nail deviate from kerve, allow steel disc 15 on winding up roller during being pulled at guide sleeve 6, I.e. plastic closure 5 makes steel disc 15 on winding up roller 7 during being pulled at guide sleeve 6, so in the bottom end quilt of plastic closure 5 When shifting onto in guide sleeve 6, winding up roller 7 winds off the steel disc 15 on 12 surface of chalk writing board, exposes chalk writing board 12.
Component is installed to by through-hole 10 on mounting bar 9 after being open by teacher and carries out demonstration lesson by plastic closure 5, The chalk writing board 12 of exposing is for teacher's writing and teaching content, while headlamp 18 is to the wiring demonstration behaviour in PLC control cabinet 4 It is illuminated;When teaching, which finishes, closes plastic closure 5, by 5 pulled down of plastic closure, what plastic closure 5 moved down Magnetic nail 23 reinserts in kerve simultaneously, the steel disc 15 on winding up roller 7 is pulled out, steel disc 15 covers chalk writing board again 12。
During plastic closure 5 moves up or down, since bristle 16 contacts chalk writing board 12, bristle 16 brushes off The written contents on 12 surface of chalk writing board keep chalk writing board 12 not have written contents in teaching, reduce teacher and are teaching The workload of written contents is also first wiped before learning;After steel disc 15 is on winding up roller 7,15 thickness of steel disc on winding up roller 7 Increase, the steel disc 15 after winding is protruded against elastic strip 17 to 12 side of chalk writing board, by bristle 16 after the protrusion of elastic strip 17 It is extruded on chalk writing board 12 and brushes off written contents, especially when plastic closure 5 moves down, the elastic strip 17 of protrusion presses against Chalk writing board 12 wipes written contents, and the content on chalk writing board 12 is made to wipe cleaner;And it is needed in teaching process When wiping the written contents on chalk writing board 12, plastic closure 5 can be slid onto or be slided to come in the writing on erasing blackboard Hold.
In slide downward plastic closure 5, plastic closure 5 pulls elastic drag rope 25, and elastic drag rope 25, which generates, stretches bullet Property deformation, elastic drag rope 25 drive piston head 24 to 27 both sides of air flue move, piston head 24 move when formed at stomata 26 it is negative Pressure allows after content of the bristle 16 on wiping chalk writing board 12 absorption to fall part chalk dust, and chalk dust is into gluing after air entering flue 27 It is attached on adhesive-layer, chalk dust is avoided to adhere to again on bristle 16, while piston head 24 scrapes air passing hole 26, dredging stomata 26 is kept away Exempt to block, when plastic closure 5 moves up, the pulling force that elastic drag rope 25 is subject to is gradually reduced, and elastic drag rope 25 gradually restores Elastic deformation allows piston head 24 to be moved towards to the centre of air flue 27, and piston head 24 squeezes the air in air flue 27 from stomata 26 It extrudes, the air squeezed out from stomata 26 forms air-flow, blows the chalk dust on bristle 16 off, keeps bristle 16 cleaner, bristle 16 When brushing chalk writing board 12, chalk dust will not be allowed to be brushed to again on chalk writing board 12.
Above-described is only the embodiment of the present invention, and the common sense such as well known concrete structure and characteristic are not made herein in scheme Excessive description.It, without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art Several modifications and improvements are made, these should also be considered as protection scope of the present invention, these all do not interfere with what the present invention was implemented Effect and patent practicability.The scope of protection required by this application should be based on the content of the claims, in specification The records such as specific implementation mode can be used for explaining the content of claim.

Claims (6)

1. a kind of PLC teaching platforms include the desk body with more table legs, PLC control cabinet is installed in the desk body, it is described Mounting groove is offered in PLC control cabinet, and mounting bar is installed on the inner wall of the mounting groove, is offered on the mounting bar logical Hole offers separated time slot on the mounting groove slot bottom below the mounting bar, it is characterised in that:Consolidate at the upper side wall of the mounting groove Equipped with the guide sleeve with spill mouth, permanent magnet is equipped on the left side wall and right side wall of the guide sleeve, the permanent magnet is opposite It is installed with conductive reed on side, is rotated in the opening of the guide sleeve and is combined with winding up roller, be slidably connected in the PLC control cabinet There are the plastic closure for sealing mounting groove, the top of the plastic closure to be located in the spill mouth of guide sleeve, the plastic closure direction It is installed with chalk writing board on one side outside mounting groove, magnetic nail is installed on the lower end of the chalk writing board, it is described Chalk-writing plate surface is equipped with the steel disc of elasticity, and the top of the steel disc is fixedly connected on winding up roller, and the steel disc can be wound on On winding up roller, the bottom end of the steel disc is installed with two pieces of iron blocks adsorbed for permanent magnet, is connected to after the iron block contact permanent magnet Conductive reed offers the kerve being inserted into for magnetic nail on the lower end of the steel disc, is installed on the inner wall of the kerve Sheet metal;
The first conducting wire in plastic closure is electrically connected between the iron block, the iron block can be connected to conductive reed, institute It states and power supply and headlamp is electrically connected with by the second conducting wire between conductive reed, headlamp is located on the roof of PLC control cabinet, described Power supply, headlamp, iron block, conductive reed, the first conducting wire and the series connection of the second conducting wire.
2. PLC teaching platforms according to claim 1, it is characterised in that:Between the left side wall and right side wall of the guide sleeve It is installed with elastic strip, the elastic strip is between winding up roller and plastic closure, and the elastic strip is towards solid on plastic closure side Equipped with the bristle for touching chalk writing board.
3. PLC teaching platforms according to claim 2, it is characterised in that:Air flue, the gas are offered in the elastic strip Road is provided with a plurality of air holes towards bristle side, and air-tightness is combined with piston head in the air flue, and the piston head is towards stomata Adhesive-layer is coated on side, the elastic drag rope that fixed oriented air flue both ends pull on the piston head, the elasticity is drawn Free state is in when in the spill mouth restricted in plastic closure bottom part in guide sleeve, the end of the elastic drag rope is fixed respectively On the bottom end of plastic closure.
4. PLC teaching platforms according to claim 1, it is characterised in that:It is solid on the left and right side edge of the steel disc Equipped with rubber layer.
5. PLC teaching platforms according to claim 1, it is characterised in that:The table leg includes the sleeve and tool of internal thread There are externally threaded supporting rod, the supporting rod threaded one end to be connected in sleeve, the supporting rod other end is fixedly connected on table On body.
6. PLC teaching platforms according to claim 1, it is characterised in that:The left side wall and right side wall of the PLC control cabinet On be hinged with L-shaped supports block, the supports block is respectively positioned at the lower face of guide sleeve, solid between the supports block and the side wall of PLC control cabinet Equipped with elastic string.
CN201810745774.5A 2018-07-09 2018-07-09 PLC teaching platform Active CN108638709B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810745774.5A CN108638709B (en) 2018-07-09 2018-07-09 PLC teaching platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810745774.5A CN108638709B (en) 2018-07-09 2018-07-09 PLC teaching platform

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Publication Number Publication Date
CN108638709A true CN108638709A (en) 2018-10-12
CN108638709B CN108638709B (en) 2020-03-17

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1760041A (en) * 2005-11-18 2006-04-19 靳婧 Automatic device for wiping blackboard assorted with blackboard in type of push and pull up down, and method of application
CN2871229Y (en) * 2006-03-13 2007-02-21 蒋晓翡 Laminated blackboard
WO2010060178A2 (en) * 2008-11-28 2010-06-03 ADUR, Renato Guimarães Mobile modular laboratory for electricity and electronics teaching
CN201970687U (en) * 2011-01-12 2011-09-14 于晓丹 Blackboard
CN102930754A (en) * 2012-11-19 2013-02-13 西安开元电子实业有限公司 Demonstrating and practical training device for video monitoring system
CN202836044U (en) * 2012-08-21 2013-03-27 浙江日普电子科技有限公司 Refrigerator refrigerating chamber lighting lamp switching device
CN206040028U (en) * 2016-07-18 2017-03-22 田怀升 Special teaching board of electromechanical specialty
CN206451390U (en) * 2017-02-10 2017-08-29 卞勇 Electric automatization practice training examination device
CN108146111A (en) * 2017-12-29 2018-06-12 天津丰澳教育科技有限公司 A kind of new teaching dust-free blackboard

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1760041A (en) * 2005-11-18 2006-04-19 靳婧 Automatic device for wiping blackboard assorted with blackboard in type of push and pull up down, and method of application
CN2871229Y (en) * 2006-03-13 2007-02-21 蒋晓翡 Laminated blackboard
WO2010060178A2 (en) * 2008-11-28 2010-06-03 ADUR, Renato Guimarães Mobile modular laboratory for electricity and electronics teaching
CN201970687U (en) * 2011-01-12 2011-09-14 于晓丹 Blackboard
CN202836044U (en) * 2012-08-21 2013-03-27 浙江日普电子科技有限公司 Refrigerator refrigerating chamber lighting lamp switching device
CN102930754A (en) * 2012-11-19 2013-02-13 西安开元电子实业有限公司 Demonstrating and practical training device for video monitoring system
CN206040028U (en) * 2016-07-18 2017-03-22 田怀升 Special teaching board of electromechanical specialty
CN206451390U (en) * 2017-02-10 2017-08-29 卞勇 Electric automatization practice training examination device
CN108146111A (en) * 2017-12-29 2018-06-12 天津丰澳教育科技有限公司 A kind of new teaching dust-free blackboard

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